package com.itheima.heimademo01.controller;

import com.itheima.heimademo01.base.response.Result;
import com.itheima.heimademo01.base.utils.JwtUtil;
import com.itheima.heimademo01.base.utils.MD5Utils;
import com.itheima.heimademo01.base.utils.ThreadLocalUtil;
import com.itheima.heimademo01.pojo.entity.User;
import com.itheima.heimademo01.service.UserService;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {
    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;


    // 要求username为5-12位非空字符且字符只能是数字和英文组成，password为6-16位数且为非空字符且字符只能是数字英文和标点符号组成
    @PostMapping("register")
    public Result register(@Pattern(regexp = "(^[a-zA-Z0-9]{5,12}$)", message = "用户名只能是5-12位非空字符且字符只能是数字和英文组成") String username, @Pattern(regexp = "(^[a-zA-Z0-9!@#$%^&*()_+\\-=\\[\\]{};':\"\\\\|,.<>\\/?]{6,16}$)", message = "密码是6-16位数且为非空字符且字符只能是数字英文和标点符号组成") String password) {
        // 查询用户是否存在
        User user = userService.findByUserName(username);
        // 判断用户是否存在
        if (user == null) {
            //用户不存在，执行注册
            userService.register(username, password);
            return Result.success();
        } else {
            // 存在
            return Result.error("用户名已经存在，请你直接登录");
        }
    }

    // 登录
    @PostMapping("login")
    public Result<String> login(@Pattern(regexp = "(^[a-zA-Z0-9]{5,12}$)", message = "用户名只能是5-12位非空字符且字符只能是数字和英文组成") String username, @Pattern(regexp = "(^[a-zA-Z0-9!@#$%^&*()_+\\-=\\[\\]{};':\"\\\\|,.<>\\/?]{6,16}$)", message = "密码是6-16位数且为非空字符且字符只能是数字英文和标点符号组成") String password) {
        // 根据username查询用户名
        User loginUser = userService.findByUserName(username);

        // 判断username用户名是否存在
        if (loginUser == null) {
            return Result.error("用户名错误");
        }

        // 判断密码是否正确
        if (MD5Utils.getMD5String(password).equals(loginUser.getPassword())) {
            // 登录成功
            HashMap<String, Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(claims);

            // 把token存储到redis中，并设置过期时间
            ValueOperations<String, String> ssvo = stringRedisTemplate.opsForValue();
            ssvo.set(token, token, 1, TimeUnit.HOURS);
            return Result.success(token);
        }

        // 密码错误
        return Result.error("密码错误");
    }

    /**
     * 获取用户详情信息
     *
     * @param token
     * @return
     */
    @GetMapping("userInfo")
    public Result<User> userInfo(@RequestHeader(name = "Authorization") String token) {
        // 根据用户名查询用户
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    /**
     * 更新用户基本信息
     *
     * @param user
     * @return
     */
    @PutMapping("update")
    public Result update(@RequestBody @Validated User user) {
        userService.update(user);
        return Result.success();
    }

    /**
     * 更新用户头像
     *
     * @param avatarUrl
     * @return
     */
    @PatchMapping("updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    /**
     * 更新用户密码
     *
     * @param params
     * @return
     */
    @PatchMapping("updatePwd")
    public Result updatePwd(@RequestBody Map<String, String> params, @RequestHeader("Authorization") String token) {
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if (!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)) {
            return Result.error("缺少必要的参数");
        }

        //原密码是否正确
        //调用userService根据用户名拿到原密码,再和old_pwd比对
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if (!loginUser.getPassword().equals(MD5Utils.getMD5String(oldPwd))) {
            return Result.error("原密码填写不正确");
        }

        //newPwd和rePwd是否一样
        if (!rePwd.equals(newPwd)) {
            return Result.error("两次填写的新密码不一样");
        }

        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        // 删除redis中的token
        ValueOperations<String, String> ssvo = stringRedisTemplate.opsForValue();
        ssvo.getOperations().delete(token);
        return Result.success();
    }
}
